Brabus 850 6.0 Biturbo Coupe: An 850-hp S63 AMG

Brabus claims its take on the Mercedes S63 AMG Coupe is the world’s fastest and most powerful all-wheel drive coupe. Scheduled to debut at the Geneva Motor Show next week, the Brabus 850 6.0 Biturbo Coupe is powered by a heavily revised version of the twin-turbo V8 engine from the S63 AMG Coupe.

Brabus 850 6.0 Biturbo Coupe

Brabus fitted the engine with a special crankshaft with longer stroke, as well as an enlarged cylinder bore and correspondingly larger forged pistons, resulting in a displacement increase from 5,461 cc to 5,912 cc. 

Brabus 850 6.0 Biturbo Coupe

Add to these modifications the two Brabus turbochargers with larger compressor units and modified exhaust manifolds and it becomes clear why the engine of the Brabus 850 6.0 Biturbo Coupe produces 850PS (838hp) at 5,400 rpm and 1,450Nm (1,069lb-ft) of peak torque between 2,500 and 4,500 rpm. 

However, torque is electronically limited to 1,150Nm (848lb-ft) “in the interest of the longevity of the entire powertrain,” as Brabus delicately puts it. The engine sends power to all four wheels via a seven-speed automatic transmission and the 4Matic all-wheel-drive system. The tuner also offers a variant with rear-wheel drive.

Performance-wise, the Brabus 850 6.0 Biturbo Coupe is blisteringly fast, sprinting from 0 to 100 km/h (62 mph) in just 3.5 seconds and from 0 to 200 km/h (124 mph) in 9.4 seconds. Top speed is restricted electronically to 350 km/h (217 mph). Brabus also modified the suspension lowering module, further lowering ride height by about 15mm (0.6in).

Brabus 850 6.0 Biturbo Coupe

The Brabus 850 6.0 Biturbo Coupe’s styling echoes these performances, thanks to the aggressive aero kit consisting of new bumpers sporting a carbon fiber spoiler at the front and a carbon fiber diffuser at the rear, as well as a subtle rear spoiler integrated in the trunk lid. Other changes include the Brabus sports exhaust kit and the Monoblock wheels, available with diameters ranging from 18 to 22 inches.

Brabus 850 6.0 Biturbo Coupe

Inside, the Brabus 850 6.0 Biturbo Coupe oozes opulence thanks to the soft and breathable black Mastik leather with copper-colored seams and piping, as well as the 219 individual parts coated in the same Shadow Gold tone as the Brabus Monoblock F wheels on the vehicle. The cabin also gets carbon-fiber elements and a deep black Alcantara headliner. 

Aluminum components such as the Brabus Race paddle shifters, pedals and door pins also contribute to the sense of occasion, as do the scuff plates with backlit Brabus 850 logo.